feat: Update concepts

Author: GeekMasher

ql/lib/codeql/bicep/Concepts.qll

@@ -5,8 +5,26 @@ private import codeql.bicep.CFG
  *  A Public Resource is a resource that is publicly accessible to the Internet.
  */
 abstract class PublicResource extends Resource {
+  /**
+   *  Returns the property that indicates public access.
+   */
+  abstract Expr getPublicAccessProperty();
+}
+
+module Cryptography {
+  abstract class WeakTlsVersion extends Resource {
+    abstract Expr getWeakTlsVersionProperty();
+
     /**
-     *  Returns the property that indicates public access.
+     *  Returns true if the resource has a weak TLS version.
+     * 
+     *  1.0 and 1.1 are considered weak TLS versions.
      */
-    abstract Expr getPublicAccessProperty();
+    predicate hasWeakTlsVersion() {
+      exists(StringLiteral literal |
+        literal = this.getWeakTlsVersionProperty() and
+        literal.getValue().regexpMatch("^(1\\.0|1\\.1)$")
+      )
+    }
+  }
 }